205885061 has 2 divisors, whose sum is σ = 205885062. Its totient is φ = 205885060.

The previous prime is 205885049. The next prime is 205885063. The reversal of 205885061 is 160588502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127012900 + 78872161 = 11270^2 + 8881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205885061 is a prime.

It is a Sophie Germain prime.

Together with 205885063, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205885063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102942530 + 102942531.

It is an arithmetic number, because the mean of its divisors is an integer number (102942531).

Almost surely, 2^205885061 is an apocalyptic number.

It is an amenable number.

205885061 is a deficient number, since it is larger than the sum of its proper divisors (1).

205885061 is an equidigital number, since it uses as much as digits as its factorization.

205885061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 205885061 is about 14348.6954459282. The cubic root of 205885061 is about 590.4841960332.

The spelling of 205885061 in words is "two hundred five million, eight hundred eighty-five thousand, sixty-one".